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“a gene for (altruism) is favored when the altruism sufficiently benefits relatives carrying the gene.”

“social evolution theory, rather than being in turmoil, is supported by multiple theoretical approaches”

“reproductive altruism could evolve if it increased the worker’s inclusive fitness, which included effects that it had on increasing the fitness of its relatives”

“One advantage of inclusive fitness thinking is that it induces researchers to think of (individuals) as agents being selected to get better outcomes (higher inclusive fitness) using whatever information is available to them.”

Abstract
The evolution of sterile worker castes in eusocial insects was a major problem in evolutionary theory until Hamilton developed a method called inclusive fitness. He used it to show that sterile castes could evolve via kin selection, in which a gene for altruistic sterility is favored when the altruism sufficiently benefits relatives carrying the gene.Continue reading →